Generic parameter 'T' could not be inferred.

[dentelezhkin]

Generic parameter 'T' could not be inferred.

[DenTelezhkin]

Try removing typealias ModelType = UIColor, this should not be needed, as type is gathered automatically from update(with:) method.

As for second issue, method pointers were removed in DTCollectionViewManager 5.0.0, because it was hard maintaining two event systems. You can react to cell selection with following:

manager.didSelect(ColorCell.self) { cell, color, indexPath in
    print("Selected \(color) at \(indexPath)")
}

Hope this resolves your issue.